XT High-Performance Thermal Storefront Systems

Thermal performance meets design flexibility. At Boyd Aluminum, we manufacture XT high-performance thermal storefront systems for architects, contractors, glaziers, building owners, and project teams that need thermally broken aluminum storefront framing, thermal storefront doors, fenestration product data, and coordinated commercial storefront solutions for the building envelope.

Our XT storefront systems are engineered to deliver superior energy efficiency without compromising aesthetics or performance. With dual pour and debridge thermal barriers, compatibility with our historic grids, and seamless integration with our entrances, the B460XT and B450XT storefront systems are built to meet demanding thermal codes and design expectations alike.

The XT storefront line includes B460XT front-set storefront framing, B450XT center-set storefront framing, D350XT medium-stile thermal entrance doors, and D500XT wide-stile thermal entrance doors. These systems support energy-conscious commercial storefront projects, storefront replacement, new construction, historic renovation, adaptive reuse, and applications where storefront framing, entrances, glazing, grids, and finishes need to work together.

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XT Thermal Storefront Product Line

Use this section to compare the core XT storefront and entrance systems. Final selection should match the project drawings, storefront layout, entrance requirements, glass plane, glazing requirements, U-value or U-factor targets when required, historic-grid requirements, finish requirements, and specifications.

XT high-performance thermal storefront systems and thermal entrance doors.

Not sure which XT storefront system fits the project? Ask our Direct Assistance™ team to review the storefront layout, entrance needs, glazing requirements, and performance targets.

Benefits of Thermally Broken Storefront Systems

Thermally broken storefront systems help reduce conductive heat transfer through aluminum framing by separating the exterior and interior portions of the frame with a thermal barrier. For project teams, that can support energy-conscious commercial storefront design, building-envelope coordination, and storefront replacement work where the existing opening still needs a clean aluminum storefront appearance.

XT storefront systems also help simplify coordination across framing, entrances, glazing, finishes, historic grids, and product data. Instead of treating storefront framing and entrance doors as separate decisions, the XT line gives architects and contractors a coordinated path for energy-efficient commercial storefronts, thermal entrance doors, historic renovation, adaptive reuse, and new construction.

Why Architects and Contractors Choose XT Storefront

• Thermal storefront framing: B460XT and B450XT use thermally broken aluminum framing for high-performance commercial storefront applications.

• Front-set and center-set options: B460XT provides a front-set glass plane that mimics a curtain wall aesthetic, while B450XT provides a center-set storefront option.

• Coordinated thermal entrances: D350XT and D500XT thermally broken entrance doors integrate with our storefront systems.

• Historic-grid compatibility: B460XT and B450XT are compatible with our historic grids for cost-effective historic renovations, adaptive reuse, restoration, and storefront replacement projects.

• Glazing and construction flexibility: Storefront systems include screw spline or shear block construction, heavy-duty mullion options, and glazing-path options shown on the individual product pages.

• Project support: Drawings, elevations, storefront schedules, entrance requirements, glazing, finishes, accessories, and bid needs can be reviewed with our Direct Assistance™ team.

Front-Set Storefront Framing with a Curtain Wall Aesthetic

The B460XT is the industry’s first dual pour and debridge thermal barrier front-set glazing system. This 2" x 4.5" front-set storefront system is designed for projects that need thermal performance, multiple glazing options, SV100 vent compatibility, heavy-duty mullion choices, and a curtain wall aesthetic for a seamless, consistent look.

The B460XT is a strong fit for cost-effective historic renovations and commercial storefront replacement projects because it coordinates with our historic grids, our entrances, anodized finishes, painted finishes, and the storefront details required for project review.

• Front-set glass plane for projects that need a curtain wall aesthetic.

• Thermally broken aluminum framing with a dual pour and debridge thermal barrier.

• Multiple glazing paths, SV100 vent compatibility, and heavy-duty mullion options.

• Historic-grid and entrance coordination for replacement, renovation, and adaptive reuse work.

Center-Set Thermally Broken Storefront Framing

The B450XT features a dual pour and debridge center-set thermal barrier glazing system for energy efficiency, durability, and storefront design flexibility. It is ideal for new construction, storefront replacement, and historic renovations that need a center-set glass plane, historic-grid compatibility, screw spline or shear block construction, SV100 vent compatibility, and entrance coordination.

• Center-set glass plane for thermally broken aluminum storefront applications.

• Thermal barrier construction for center-set storefront framing.

• Screw spline or shear block construction with storefront vent compatibility.

• Historic-grid and entrance coordination for commercial building envelope projects.

Commercial Thermal Entrance Doors: Medium vs. Wide Stile

XT storefront entrances can be coordinated with thermally broken D350XT medium-stile and D500XT wide-stile commercial storefront doors. These thermal entrance doors combine energy efficiency, clean design, welded-corner construction, 2" door thickness, 1" insulated glass units, and hardware options for commercial storefront applications.

XT thermal storefront entrance door options.

XT Storefront Performance Data

The values below summarize available product-page data for the XT storefront systems. Project-specific results and requirements should be reviewed against the selected system, glass, glazing method, entrance configuration, opening conditions, and specifications.

For projects with thermal or building-envelope performance targets, review the selected storefront system against the specified U-value or U-factor, SHGC target if included in the specifications, glazing package, air infiltration, water resistance, structural performance, and entrance requirements. Product-page values are a starting point; final performance review should be tied to the selected system, glass, and project conditions.

XT storefront product-page performance data.

Need help confirming performance requirements? Send the drawings, storefront schedule, glazing requirements, and U-value or U-factor targets for review.

Historic Grid and Storefront Design Coordination

B460XT and B450XT storefront systems are compatible with our historic grids, giving project teams a thermal storefront path for cost-effective historic renovation, adaptive reuse, restoration, and commercial storefront replacement projects. Historic-grid selection should be coordinated with the storefront system, entrance system, glass plane, finish, muntin layout, existing openings, and project specifications.

Technical Documentation and Project Support

Architects, contractors, and glaziers can use the individual B460XT, B450XT, D350XT, and D500XT product pages above to review available product data, performance values, system information, detail drawings, specifications, finish options, and project-specific resources. For broader category information, review our commercial aluminum storefront systems, commercial aluminum storefront doors, and curtain wall system details pages.

For project-specific documentation, send the project name, location, bid date, drawings, elevations, storefront schedule, entrance requirements, glazing requirements, U-value or U-factor targets if required, SHGC target if specified, finish requirements, historic-grid requirements, and accessory needs. Our Direct Assistance™ team can help review system selection, specifications, details, product resources, performance requirements, and bidding requirements. Resource availability may vary by system, so final documentation should be confirmed for the selected storefront framing or entrance door configuration.

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XT High-Performance Thermal Storefront FAQ

Which XT storefront system should I use if I want a curtain wall look?

B460XT is the better starting point when a project needs a front-set glass plane and a curtain wall aesthetic. It is the industry’s first dual pour and debridge thermal barrier front-set glazing system and can coordinate with our entrances, historic grids, SV100 vents, and available glazing paths.

When should I choose B450XT instead of B460XT?

B450XT is the center-set option in the XT storefront line. It is a strong fit when the project calls for thermally broken aluminum storefront framing with a center-set glass plane, screw spline or shear block construction, storefront vent compatibility, historic-grid coordination, and entrance coordination.

Can XT storefront systems be used on historic renovation or adaptive reuse projects?

Yes. B460XT and B450XT are compatible with our historic grids, which can support historic renovation, adaptive reuse, restoration, and storefront replacement projects where the selected system, glass plane, finish, and grid layout align with project requirements.

Can the storefront framing and entrance doors be reviewed together?

Yes. B460XT and B450XT storefront systems can coordinate with D350XT medium-stile and D500XT wide-stile thermally broken storefront doors. This helps project teams review framing, entrances, glazing, hardware, finishes, and details as one coordinated storefront package.

What product data should be reviewed before specifying XT storefront systems?

Review the selected system, glass plane, glazing thickness, thermal barrier type, water resistance, air infiltration, structural performance, entrance requirements, finish requirements, historic-grid requirements, and any U-value or U-factor targets included in the project specifications.

Are CAD, details, specifications, or project documents available?

Available product data, detail drawings, specifications, finish information, and project-specific resources should be reviewed on the individual product pages or confirmed with our Direct Assistance™ team. Resource availability may vary by system and project requirements.

What information helps speed up an XT storefront quote?

Send the project name, location, bid date, drawings, elevations, storefront schedule, entrance requirements, glazing requirements, finish requirements, historic-grid requirements, accessory needs, any required U-value or U-factor targets, and any SHGC target included in the specifications. That information helps our team review the correct storefront framing, entrance options, and performance requirements.